Speculation that Zuckerberg could be interested in property on Kauai mounted last year after he was spotted on the island, with his wife Priscilla Chan, eating at Bubba Burgers.

One of many North Shore beaches. Zuckerberg's will have to remain public as per Hawaii law.Flickr/Donna SIt would be his latest leap up the property ladder. In 2010 Zuckerberg was renting a modest property near Facebook's headquarters while he put in 16 hour days at the office.

The following year he upgraded to a $7 million, 5,000 sq ft residence in Palo Alto, California which was still modest in comparison to the homes of other technology billionaires.

He later spent $30 million buying up four homes adjoining his in Palo Alto to fend off a developer who was going to purchase them, and market them as being "next door to Mark Zuckerberg".

When asked about his latest reported acquisition a Facebook spokesman told Forbes : "We don't comment on rumours and speculation, but thank you for reaching out!"